• 2021-04-14
    若随机变量, 且则二维随机变量服从二维正态分布。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/06902c8739054c2686716051f5d8b3fd.png
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      已知随机变量的方差存在,且满足不等式则一定有()。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/c19400d889b844f3b4e8c6e30240cbc0.png

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      随机变量独立同分布且服从相同参数λ的泊松分布,则下面随机变量序列中不满足切比雪夫大数定律条件的是()。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/eea6b03d4ade42b1af342cf8adf60e63.png

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      若,则( )https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/72bcab7a9a534faf8d3f5d65db5dd498.png

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      若,则( )https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/e2c6072ec7f1492cb1400e58229e54f2.png

    • 4

      若二维随机变量(X,Y)在半径为1的圆D上服从二维均匀分布,则联合密度函数为 则常数C=(00a000a000a0)。https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/d064a3d7e0474c08b7b054f6cb514aad.png